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US Patent 7434402 System for actively controlling compressor clearances

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Is a
Patent
Patent
1

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
74344021
Patent Inventor Names
Adam Matthew Foust1
Hubert Edward Paprotna1
Date of Patent
October 14, 2008
1
Patent Application Number
110927751
Date Filed
March 29, 2005
1
Patent Citations Received
‌
US Patent 11982189 Warm start control of an active clearance control for a gas turbine engine
2
‌
US Patent 11879411 System and method for mitigating bowed rotor in a gas turbine engine
3
Patent Primary Examiner
‌
Ted Kim
1
Patent abstract

Aspects of the invention relate to a system and method for actively controlling compressor clearances in a turbine engine by passing a thermal fluid in heat exchanging relation through a compressor vane carrier. During some operational conditions, such as hot restart or spin cool, it may be desirable to heat the vane carrier to enlarge or at least prevent a decrease in compressor clearances. In such cases, a heated thermal fluid can be provided by reclaiming residual exhaust energy from a heat recovery steam generator. At any condition where improved performance is desired, such as at base load operation, the vane carrier can be cooled to minimize compressor clearances. A cooled thermal fluid can be bleed air from an upstream portion of the compressor, water-cooled high pressure bleed air from a downstream portion of the compressor, or feed water from the bottoming cycle in a combined cycle engine.

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